People in the Polish capital are holding a day of commemorations on the 75th anniversary of the Warsaw Ghetto Uprising.
People stopped in the street and officials stood at attention as sirens wailed and church bells tolled at noon in a sign of mourning for the Jews who died fighting, as well as the millions of other Jews murdered in the Holocaust.
The daffodils tradition comes from Marek Edelman, the last surviving commander of the uprising, who on every anniversary used to lay the spring flowers at the monument to the fighters before his death in 2009.
President Andrzej Duda spoke during official commemorations at the Monument to the Warsaw Ghetto Heroes and pay homage to the hundreds of Jewish fighters who took up arms in the 1943 rebellion against the German forces that occupied Poland during the Second World War.
The revolt ended in death for most of the fighters, yet left behind an enduring symbol of resistance.
At a ceremony at Warsaw's Town Hall, three Holocaust survivors, Helena Birenbaum, Krystyna Budnicka and Marian Turski, were given honorary citizenship of the city.
Hundreds attended an "independent" gathering by Poles furious at a government that sometimes seems to tolerate or even support anti-Semitic views despite its official denunciations of anti-Semitism.
Open Republic, an association that fights anti-Semitism and xenophobia, said it was organising its ceremony in opposition to what it called the "hollow nationalist pomp" of the government, recalling how the prime minister earlier this year paid tribute to a Polish wartime insurgency unit that had collaborated with the Nazis.
Their observances began with Yiddish singing at the monument to a Jewish envoy in London, Szmul Zygielbojm, who killed himself after the revolt was crushed, in protest at the world's indifference to the Holocaust.
The signs of rising nationalism have also strengthened the resolve of those seeking reconciliation, and this year a record 2,000 volunteers are handing out the paper daffodils.
They have become a moving symbol of Christian Poles expressing their sorrow at the loss of a Jewish community that was Europe's largest before the Holocaust.
"I feel this is my responsibility and do it with all my heart," said Barbara Sekulska, 76, who joined mostly younger volunteers.
The Warsaw Ghetto uprising broke out on April 19, 1943, when about 750 young Jewish fighters armed with just pistols and fuel bottles attacked a much larger and heavily armed German force.
In their last testaments, they said they knew they were doomed but wanted to die at a time and place of their own choosing.
In the end, the fighters held out nearly a month, longer than some German-invaded countries did.
The Germans razed the ghetto and killed most of the fighters, except for a few dozen who managed to escape the ghetto through sewage canals to the "Aryan" side of the city, Mr Edelman among them.
Israeli dignitaries usually attend the major ghetto commemorations, but mostly remained home because the Warsaw anniversary this year coincides with major celebrations in Israel marking the 70th anniversary of the founding of that nation in 1948.